package com.ztf.shiro01helloworld;

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.*;
import org.apache.shiro.config.IniSecurityManagerFactory;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.Subject;
import org.apache.shiro.util.Factory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
 * Simple Quickstart application showing how to use Shiro's API.
 */
public class Quickstart {

    private static final transient Logger log =
            LoggerFactory.getLogger(Quickstart.class);
    public static void main(String[] args) {
        // The easiest way to create a Shiro SecurityManager with  configured
        // realms, users, roles and permissions is to use the simple INI config.
        // We'll do that by using a factory that can ingest a .ini file and
        // return a SecurityManager instance:
        // Use the shiro.ini file at the root of the classpath
        // (file: and url: prefixes load from files and urls respectively):
        /**
         * 是shiro的心脏，所有具体的交互都通过security Manager进行控制，他管理者所有的subject，且负责
         * 进行认证，授权，会话，以及缓存的管理
         */
        Factory<SecurityManager> factory = new IniSecurityManagerFactory("classpath:shiro.ini");
        SecurityManager securityManager = factory.getInstance();
        // for this simple example quickstart, make the  SecurityManager
        // accessible as a JVM singleton. Most applications wouldn't do this
        // and instead rely on their container configuration or web.xml for
        // webapps. That is outside the scope of this simple quickstart, so
        // we'll just do the bare minimum so you can continue to get a feel
        // for things.
        SecurityUtils.setSecurityManager(securityManager);
        // Now that a simple Shiro environment is set up, let's see  what you can do:
        // get the currently executing user:
        //任何可以与应用交互的‘用户’;
        Subject currentUser = SecurityUtils.getSubject();
        // Do some stuff with a Session (no need for a web or EJB container!!!)
        Session session = currentUser.getSession();
        session.setAttribute("someKey", "aValue");
        String value = (String) session.getAttribute("someKey");
        if (value.equals("aValue")) {
            log.info("Retrieved the correct value! [" + value + "]");
        }
        // let's login the current user so we can check against roles and permissions:
        if (!currentUser.isAuthenticated()) {
            UsernamePasswordToken token = new
                    UsernamePasswordToken("lonestarr", "vespa");
            token.setRememberMe(true);
            try {
                currentUser.login(token);
            } catch (UnknownAccountException uae) {

                log.info("There is no user with username of " +
                        token.getPrincipal());
            } catch (IncorrectCredentialsException ice) {
                log.info("Password for account " +
                        token.getPrincipal() + " was incorrect!");
            } catch (LockedAccountException lae) {
                log.info("The account for username " +
                                token.getPrincipal() + " is locked. " +
                                "Please contact your administrator to unlock it.");
            }
            // ... catch more exceptions here (maybe custom ones specific to your application?catch (AuthenticationException ae) {
            //unexpected condition? error?
            }
                //say who they are:
                //print their identifying principal (in this case, a username):
        log.info("User [" + currentUser.getPrincipal() + "] logged in successfully ");
                //test a role:
        if (currentUser.hasRole("schwartz")) {
            log.info("May the Schwartz be with you!");
        } else {
            log.info("Hello, mere mortal.");
        }
        //test a typed permission (not instance-level)
        if (currentUser.isPermitted("lightsaber:wield")) {
            log.info("You may use a lightsaber ring. Use it wisely.");
        } else {
            log.info("Sorry, lightsaber rings are for schwartz mastersonly.");
        }
        //a (very powerful) Instance Level permission:
        if (currentUser.isPermitted("winnebago:drive:eagle5")) {
            log.info("You are permitted to 'drive' the winnebago with license plate (id) 'eagle5'. " + "Here are the keys - have fun!");
        } else {
            log.info("Sorry, you aren't allowed to drive the 'eagle5' winnebago!");
        }
        //all done - log out!
        currentUser.logout();
        System.exit(0);
    }
}
